Chemical water heater



April 28, 1953 F. J. DI STEFANO CHEMICAL WATER HEATER Filed Aug. 2l, 1951 INVENTOR fa/w( d DAS ref/m10 BY MQW/@Mmm v /a/yzdwb ATTORNEYS Patented Apr. 28, 41953 UNITED STATES PATENT OFFICE CHEMICAL WATER HEATER Frank Joseph Di Stefano, Brooklyn, N. Y.

ApplicationAugust 21, 1951, SerialNo. 242,857

I'his invention relates tewater heaters, and more particularly to a device for heating water, said device utilizingA chemical heating means of the type comprising reagents which react together to produce heat when moistened with Water.

A main object of the invention is to provide a novel and improved portable heating device which is simple in construction, which involves only a few parts, and which is particularly suitable for iield use, as for example, members of the Armed Forces when engaged in maneuvers or other field activities, and when it is desired to heat water in a rapid and convenient manner without the necessity of building a re.

A further object of the invention is to provide an improved chemical water-heating apparatus which is inexpensive to manufacture, which is very compact in size, which is light in weight, and which is easy to manipulate.

Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

Figure 1 is a perspective view, partly broken away, of an improved chemical water-heating apparatus constructed in accordance with the present invention;

Figure 2 is a vertical cross-sectional view taken on the line2-2 of Figure 1;

Figure 3 is a transverse vertical cross-sectional view taken on the line 3--3 of Figure 1;

Figure 4 is a horizontal cross-sectional view taken on the line 4-4 of Figure 1.

Referringto the drawings, the heating apparatus is designated generally at II. The apparatus comprises a rectangular outer container I 2 provided with the removable flanged top cover I3. The top cover I3 is formed at its topWall with the spaced apertures I4 to allow free escape of gases from the interior of the container. Designated at I5 is a rack device slidably engaged in the container I2, said rack device comprising a central wall element I 6 extending substantially to the top of the outer container I2, respective opposing horizontal flanges I1, II integral with and extending from the bottom edges of the wall element I6, and respective upstanding, perforated vertical flanges I 8, I8 at the .outer margins of the horizontal flanges I'I, I'I, whereby receptacles are defined on opposite sides of the wall element I6. Disposed in said receptacles are respective pads I9, I9 which are impregnated with chemicals of the type producing heat by exothermic reaction when moistened with water,

' 'n 3 Claims. (Cl. 126-263) such as for example, the pads of the type described i'n United States Patent 2,239,410, to H. Bonat, said pads being impregnated with suitable reagents which react together to produce heat when moistened with water. Such pads are well known per se and form no part of the present invention.

The top end of the upstanding wall element I6 tapers, as shown in Figure 2,' to ldefine a readily accessible handle for grasping the rack device I5 to Vremove said rack device from the container I2 when the cover I3 is ,disengaged from said container.

The opposing horizontal anges I'I, I1 are covered by a sheet metal liner 20 having top arms 2! covering the top surfaces of the anges I'I, I'I, and serving to rigidify the lower portion of the rack structure I5.

In using the device, the rack I5 containing the pads I9, I9 is removed from the container I2 and is dipped into water to thoroughly moisten the pads I9, I9. The rack and moistened pads are then reinserted in the container I2 and the top cover I3 is placed thereon. The container I2 may then be inserted in the vessel of water to be heated, the chemical reactions produced by the moistened pads I9, I9 producing suiiicient heat to raise the water in the vessel to a high temperature and to maintain said water heated for a substantial period of time thereafter. The exothermic reaction of the chemicals in the pads I9, I9 generates a substantial amount of heat very rapidly, and the generation of heat continues for a relatively long period of time, enabling a substantial quantity of water to be kept hot for a period of from twenty to thirty minutes. After the device has been used once in this manner, the pads I9, I9 may be replaced, enabling the device to be used for a subsequent water-heating operation.

While a specific embodiment of an improved chemical water-heating apparatus has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claims.

What is claimed is:

1. A chemical water-heating apparatus comprising a generally rectangular outer container, a removable perforated cap engaged on the top of said outer container, and a rack slidably engaged in said outer container, said rack being arranged to receive and support a plurality of heat-generating pads of the type producing heat by exothermic reaction when moistened, said rack comprising a central wall element extending to the top of the outer container, respective opposing horizontal flanges secured to the bottom edge of said wall element, and respective upstanding perforated flanges at the outer margins of said horizontal flanges defining receptacles for said pads on opposite sides of said central Wall element.

2. A chemical Water heating apparatus -com'- prising a generally rectangular outer container, a removable perforated cap engaged on the top gaged in said outer container, said rack being arranged to receive and support a plurality of i heat generating pads of the type producing heat by exothermic reaction when moistened, said rack comprising a central Wall element extend-` ing to the top of the outer container, respective opposing horizontal flanges secured tothe bottom edge of said Wall element,l and respective upstanding perforated flanges at'the outermare gins `of said horimntal flanges defining Arecap-- tasles for said pads on opposite 'sides of said central Wall element, the top end of said central Wall element tapering in width to define a handle for grasping the rack to remove the rack from the outer container.

3. A chemical water heating apparatus comprising a closed outer container having apertures in the top thereof and a rack slidably disposed in said outer container, said rack being arranged to receive and support a plurality of heat generating pads of the type producing heat by exothermic reaction When moistened, said rack comprising a central vertical Wall element, respective opposing horizontal flanges secured to the` lower portion of said Wall element,and respective upstanding flanges at the outer'margins of said horizontal flanges defining receptacles for said pads on opposite sides of said central Wall element;

FRANK JOSEPH DI STEFANO.

References Cited in the file of this patent UNTED STATES PATENTS Number Name y Date 366,769" Amoore' July 19, 1887 A 1,088,926 Radlein et al Mar. 3,1914 1,498,9S3 Haber June 24, 1924. 2,23%);116 Bonat Apr. 22', 1341 2,300,793' Martin Nov. 3, 1942 FOREIGN PATENTS Number Country Date' f i18031.65 France' Mar. 21, 1916 

